win_c2looper_auto

YARA detection rule by Felix Bilstein - yara-signator at cocacoding dot com · Unknown

Detects win.c2looper.

rule win_c2looper_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.c2looper."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.c2looper"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 4889f0 4c29f0 4e8d3c37 4c897c2448 4889442450 48c744245800000000 4889442460 }
                                                                                                
        $sequence_1 = { be00100000 90 41803c30bf 0f8f74ffffff 41807c30ffbf 0f8f2d010000 41807c30febf }
                                                                                                
        $sequence_2 = { b802000000 488985d0030000 31ff 31f6 31db 4981f801020000 7322 }
                                                                                                
        $sequence_3 = { 4885c0 0f84d5100000 440f1108 c7401072696162 66c740146c65 c6401657 48c78424e001000017000000 }
                                                                                                
        $sequence_4 = { 0fb6d2 83c2d0 83fa0a 0f8387000000 48ffc1 6601d0 73d3 }
                                                                                                
        $sequence_5 = { 4d39fe 0f84c0fdffff 4c01d7 66662e0f1f840000000000 f30f6f13 f30f6f5b10 660f6fe2 }
                                                                                                
        $sequence_6 = { 4d89f8 4531c9 ffd0 4889442470 4883bc24f000000000 7414 ff15???????? }
                                                                                                
        $sequence_7 = { 41b802000000 488d1589eb0000 ff5018 49ffc7 b101 4939ff 0f85f7fcffff }
                                                                                                
        $sequence_8 = { 0f8cc1070000 48ffc7 49ffce 4d89f5 4889fb 4d85f6 7441 }
                                                                                                
        $sequence_9 = { 4889442420 4c89f1 4c89fa e8???????? 0f0b 55 }
                                                                                    
    condition:
        7 of them and filesize < 271360
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

248fc287-08f7-45fb-8455-e34cdfa3fc35

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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